![]() Magnetic Force Calculation Between Thin Coaxial Circular Coils in Air Slobodan I. measurement: Using the techniques outlined in the previous sections, it is possible to calculate the low-frequency external inductance of solenoids to an accuracy of a few parts in 1000 using a micrometer or a good set of engineer’s callipers and a personal computer. Unlike a toroidal inductor on a ferrite ring, the magnetic flux of the coil on the ferrite rod is not fitting completely within the ferrite and each magnetic field line goes through the ferrite core and through the air, so the calculation of such coil is more complex. Ramesh Gupta, Superconducting Magnet Division (SMD), BNL Coil Design HTS Solenoid Design Review, 10/13/06 9 Field Component in Yoke Free Case at design current (LN 2 test)įerrite rod core inductance. The A and g terms are related to the geometry of the coil, and you can use appropriate values for a pinball coil. Go to this site for a simplified estimation of the coil force, and plug in both sets of numbers, and compare the resulting coil force for each coil. ![]() Use wire gauge chart to determine wire diameter. ![]() ![]() Coil parameter calculations Enter wire diameter, number of turns, bobbin length, bobbin diameter then click compute. ![]()
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